257011148 has 12 divisors (see below), whose sum is σ = 450271752. Its totient is φ = 128362080.

The previous prime is 257011147. The next prime is 257011159. The reversal of 257011148 is 841110752.

It is a self number, because there is not a number n which added to its sum of digits gives 257011148.

It is not an unprimeable number, because it can be changed into a prime (257011141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31793 + ... + 39048.

It is an arithmetic number, because the mean of its divisors is an integer number (37522646).

Almost surely, 2^257011148 is an apocalyptic number.

It is an amenable number.

257011148 is a deficient number, since it is larger than the sum of its proper divisors (193260604).

257011148 is a wasteful number, since it uses less digits than its factorization.

257011148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71752 (or 71750 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 257011148 is about 16031.5672346780. The cubic root of 257011148 is about 635.7953107635.

The spelling of 257011148 in words is "two hundred fifty-seven million, eleven thousand, one hundred forty-eight".